/*
 * Copyright (C) 2013 Square, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package cn.leestudio.restlib.annotation;

import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;

import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

/**
 * 三种策略：
 *    1. OutlineFirst离线数据优先，如果未过期，直接使用离线数据，不请求线上数据。
 *    2. OnlineFirst线上数据优先，保持使用线上数据，同时更新缓存备用。如果网络失败，使用离线数据。
 *    3. Both 同时使用，先预览离线数据，再更新线上数据，同时更新缓存。
 */
@Documented
@Target(METHOD)
@Retention(RUNTIME)
public @interface Cache {
  /** 策略 */
  String policy() default "OutlineFirst";
  /** 有效期 */
  int time() default 300;
}
